[bitnami/rabbitmq] feat: ✨ Allow password updates

[javsalgar]

Signed-off-by: Javier J. Salmerón García [email protected]

Description of the change

This PR allows updating passwords in the RabbitMQ chart. In order to not break existing deployments, this must be set using auth.updatePassword=true. In future majors, once this is mature enough, we could consider enabling it by default.

It also adds a documentation section in the README.md file.

Benefits

Better password management

Possible drawbacks

Unexpected corner cases

Applicable issues

• fixes #

Additional information

Checklist

• Chart version bumped in Chart.yaml according to semver. This is not necessary when the changes only affect README.md files.
• Variables are documented in the values.yaml and added to the README.md using readme-generator-for-helm
• Title of the pull request follows this pattern [bitnami/<name_of_the_chart>] Descriptive title
• All commits signed off and in agreement of Developer Certificate of Origin (DCO)

[juan131]

LGTM